Isn't that obvious?

In the options menu of Zero Escape: 999, when you change the voice volume it plays a voice line of the protagonist saying "The nonary game" so that you can check the volume. When Joe tried changing the voice volume he realized that you can spam it and mess with the voice line. When Joe opened Zero Escape: Virtue's Last Reward for the first time at the beginning of one of his 999 streams, he went into the options menu to see if he could still use it to spam a voice line, and he discovered that he could and that the line this time was "Isn't that obvious?" And then he went on to spam that at the start of every Virtue's Last Reward stream.